Fig. 4From: The TRIFLOW study: a randomised, cross-over study evaluating the effects of extrafine beclometasone/formoterol/glycopyrronium on gas trapping in COPDMean residual volume (RV) change on day 5 compared to Day 1 pre-dose value. Bars are 95% confidence intervals. BDP beclometasone dipropionate, F formoterol, G glycopyrroniumBack to article page